{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345493",
    "entityType": "User",
    "nonce": "0x3510ecf678ee56845721c8dc17a715d63110564cef523acde23c58906c293ddb",
    "signature": "0x2ca1519acf75a67f0e9442a8ccc4f8021be6199867fbb52bc036172f1a0aff330904f7d53a9c9eaeb00e2269327effe90949add4508718e404394256d99140261c",
    "signer": "0x1A0e34aBD5374BDd677c5de4D5D9718089cB05Eb",
    "userId": "644286186"
  }
}